Stansport Rectangular Sleeping gax Explorer, 40F #523 A royal blue soft nylon outer shell fabric along with resilient poly-cotton lining. It has 4 lbs. of “Poly-Therm” insulation and has double layer construction with a size of 75" x 30". A nylon stuff bag is included with this rectangular bag that is rated for comfort at 30 degrees. Shipping Weight: 5 lbs.